The VST 3 SDK now provides a file that allows developers to tag their VST 3 plug-ins as a replacement for another plug-in (for example, an older VST 2 version), even if they have different UIDs.
https://forums.steinberg.net/t/vst-3-7-5-sdk-released/786928
This is currently supported by Kontakt 7, which can replace Kontakt 5 in older projects/templates. Deleting the Cubase Pro VST3 Cache folder might be necessary to trigger a plug-in rescan if you already have Kontakt 7 installed.